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On the role played by turbulence closures in hull shape optimization at model and full scale

Abstract : The practical use of automated CFD-based design tools in ship-building industry requires powerful flow solvers, able to take into account realistic geometries as well as complex physical phenomena, such as turbulence. A shape optimization tool is developed in this framework. A derivative-free optimizer, yielding both flexibility and robustness, is preferred to the classical gradient-based method, more fastidious to implement and still limited to moderately complex problems. The flow solver included in the design procedure solves the incompressible Reynolds-averaged Navier-Stokes equations on unstructured grids using a finite-volume formulation, involving several near-wall low-Reynolds number turbulence models. The design tool is then applied to optimize the stern of a modern hull shape at model and full scale, different purposes being considered. Our interest is particularly focused on the influence of turbulence modeling in the design process. The effects of a two-equation model based on the eddy-viscosity assumption and a second-order closure relying on the Reynolds stress transport equations are compared.
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Contributor : Régis Duvigneau Connect in order to contact the contributor
Submitted on : Tuesday, January 25, 2022 - 11:09:08 PM
Last modification on : Wednesday, April 27, 2022 - 5:00:22 AM
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Régis Duvigneau, Michel Visonneau, Ganbo Deng. On the role played by turbulence closures in hull shape optimization at model and full scale. Journal of Marine Science and Technology, Springer Verlag (Germany), 2003, 8 (1), pp.11-25. ⟨10.1007/s10773-003-0153-8⟩. ⟨hal-01731298⟩



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